#include <DS1307RTC.h>
#include <Time.h>
#include <Wire.h>

void setup()
{
    Serial.begin(9600);
    delay(200);
    Serial.println("DS1307RTC Read Test");
    Serial.println("-------------------");
}

void loop()
{
    tmElements_t tm;
    // 读出DS1307中的时间数据
    if (RTC.read(tm))
    {
        Serial.print("Ok, Time = ");
        print2digits(tm.Hour);
        Serial.write(':');
        print2digits(tm.Minute);
        Serial.write(':');
        print2digits(tm.Second);
        Serial.print(", Date (D/M/Y) = ");
        Serial.print(tm.Day);
        Serial.write('/');
        Serial.print(tm.Month);
        Serial.write('/');
        Serial.print(tmYearToCalendar(tm.Year));
        Serial.println();
    }
    else
    {
        if (RTC.chipPresent())
        {
            Serial.println("The DS1307 is stopped.  Please run the SetTime");
            Serial.println("example to initialize the time and begin running.");
            Serial.println();
        }
        else
        {
            Serial.println("DS1307 read error!  Please check the circuitry.");
            Serial.println();
        }
        delay(9000);
    }
    delay(1000);
}

void print2digits(int number)
{
    if (number >= 0 && number < 10)
    {
        Serial.write('0');
    }
    Serial.print(number);
}